/* @flow */

export function assert(condition: any, message: string) {
  if (!condition) {
    throw new Error(`[vue-router] ${message}`);
  }
}

export function warn(condition: any, message: string) {
  if (process.env.NODE_ENV !== "production" && !condition) {
    typeof console !== "undefined" && console.warn(`[vue-router] ${message}`);
  }
}

export function isError(err: any): boolean {
  return Object.prototype.toString.call(err).indexOf("Error") > -1;
}
